The word "misdemeanours" (Line 3, Paragraph 1) can be replaced by ______.
A. severe crimes.
B. homicide.
C. misbehaviors.
D. nonsense doings.
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What can be inferred from the passage？
A. Twitter would like to make the word "resonant" a popular buzzword.
B. The ads that are resonated by most users are the best ones.
C. Twitter"s "resonant" strategy is proved to be successful.
D. Companies may run a risk if they pay for Twitter"s ads.
What is the problem that Facebook is faced with？
A. Lack of social support, it is hard for Facebook to become popular.
B. It meets difficulties when Facebook makes ads in a social network.
C. Facebook meets with intense competition from new rivals like Twitter.
D. It is difficult for Facebook to make ads online just as offline.
What makes Twitters ads well-known？
Ads writers would like to promote their own work.
B. Professional ads writers have produced many creative ads.
C. Many companies provide support since they can benefit from the ads.
D. A lot of followers are willing to buy self-branding products.
______the explosion occurred was that the laboratory attendant had been careless.
A. That
B. What
C. Why
D. How
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